Vault and vault-door.



PATENTED FEB. 21, 1905.

T. w. KERR. VAULT AND VAULT DOOR.

APPLIUATION FILED APR. 16, 1904.

. w EJ y.,,//////////// L 7 m Way/@222? and I do hereby declare the following to be a g UNITED STATES Patented February 21, 1905.

PATENT OFFICE.

VAULT AND VAULT-DOOR.

SPECIFICATION forming part of Letters Patent No. 782,911, dated February 21, 1905.

Application filed April 16, 1904. Serial No. 203,508-

To all whom it may concern.-

Be it known that I, THOMAS W. KERR, a citizen of the United States, residing at 1620 Thirty-second street, Washington, District of Columbia, have invented certain new and useful Improvements in Vaults and Vault-Doors;

full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the To this end the invention consists in certain details of construction of the door-frame and door and combination of parts hereinafter described, and more particularly pointed out in the claims concluding thisspecification.

In the accompanying drawings, illustrating the preferred embodiment of my invention, Figure 1 is a front elevation of'a vault, showing the construction of the door and dooropening; and Fig. 2 is a cross-sectional view on line w of Fig. 1, showing more particu larly the air-space in the walls of the vault and the comparative thickness of the door and walls.

Referring more particularly to the drawings, the body of the vault is constructed of a hollow wall comprising an inner wall 1 and an outer wall 2, so arranged that an air-space 3 is left all about between them. Suitable tie pieces or plates 4 are placed at suitable in-' tervals'between the two walls and preferably project about four inches within said walls. The opening for the door is incased by a metal plate 5, which has slots 6 registering with the air-spaces between the walls. The plate may be made integral and be slotted nearly the entire length of its sides and top, merely leaving enough of the metal to tie the sections together, or it may be made in two separate walls and that back of the door.

sections, which may be secured together by bolts or other suitable means.

The door 7 is preferably made of a metal frame 8, filled in with bricks or tile 9, and is of such thickness that it will not extend far enough inward when closed to cut off the circulation of air between the space between the A second door may be swung to the inner wall, so that when both are closed the air-space will be continuous from opposite sides of the vault-doors.

I am aware that changes in detail may be made in the construction and arrangement shown and described herein without departing from the spirit or sacrificing the advantages of my invention. I therefore reserve the right to make such changes as fairly fall within the scope of my invention.

The advantage of making the filling of my door of a series of blocks of refractory material instead of one solid block, the two series breaking joints, is that if it cracks it will not expose a passage clear through the door, nor will it be necessary'to replace the whole filling of the door; but one or two blocks only need be replaced.

Having thus described my invention, what I claim as new, and desireto secure by Letters Patent, is

1. In a vault consisting of outer and inner walls having a continuous intermediate airspace, a doorway having plates with slots registering with the air-space between said walls.

2. In a vault consisting of outer and inner walls having a continuous intermediate airspace, the combination of a doorway having plates with slots registering with the air-space In testimony whereof I-afiix my signature in presence of two witnesses.

" T. W. KERR.

Witnesses:

JOSEPH R. EDSON, W. CLARENCE DUVALL. 

